Driving device and door closer

Abstract

In a door closer (100) that includes a striker (ST) provided on a body of a vehicle so as to be engageable with a latch (12) provided on a trunk lid, a closer mechanism (20) that pulls in the striker (ST) put in engagement with the latch (12) to close the trunk lid, and a closer driving unit (30) that actuates the closer mechanism (20), the close driving unit (30) includes two driving motors (32u, 32b), two worms (33u, 33b) provided on the driving motors (32u, 32b), and a worm wheel (34) engaged with the worms (33u, 33b), and the closer mechanism (20) is actuated through rotation of the worm wheel (34) caused by driving of the driving motors (32u, 32b).

Description

TECHNICAL FIELD [0001] The present invention relates to a driving apparatus that actuates an assisting mechanism serving as an assistant for opening operation or closing operation of a door in a vehicle, and a door closer that is applied with the driving apparatus. BACKGROUND ART [0002] In an ordinary vehicle, for closing a door such as a trunk lid, for example, a latch is provided on the trunk lid, while a striker is provided on a body of the vehicle, so that the door is closed such that the latch and the striker are engaged with each other. [0003] In the vehicle, for example, when the trunk lid is closed, the trunk lid must be pushed toward the body, while a weather strip provided on the body of the vehicle is being deformed elastically, that results in increase of a force required for closing the trunk lid. Accordingly, when the trunk lid is closed, it must be forcibly pushed down. Since vibrations at a closing time of the door become large, a rear seat passenger or vehicle occup...

AI Technical Summary

Benefits of technology

[0009] Accordingly, an object of the present invention is to provide a driving apparatus and a door closer that allow downsizing.

Problems solved by technology

In the vehicle, for example, when the trunk lid is closed, the trunk lid must be pushed toward the body, while a weather strip provided on the body of the vehicle is being deformed elastically, that results in increase of a force required for closing the trunk lid.

Since vibrations at a closing time of the door become large, a rear seat passenger or vehicle occupant may feel uncomfortable.

Therefore, since power transmitted from the driving motor to the worm wheel through the worm inevitably becomes large, a large-sized worm wheel is required for securing a sufficient strength as the worm wheel, which results in over-sizing of the driving apparatus and a door closer including the driving apparatus.

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